Activity Coefficients of Electrolytes in the NaCl + Na2SO4+ H2O Ternary System from Potential Difference Measurements at (298.15, 303.15, and 308.15) K

2011 ◽  
Vol 56 (12) ◽  
pp. 4935-4943 ◽  
Author(s):  
Florinela Sirbu ◽  
Olga Iulian ◽  
Alina Catrinel Ion ◽  
Ion Ion
Keyword(s):  
Ternary System ◽  
Activity Coefficients ◽  
Potential Difference

Vapour-liquid equilibrium in the ternary system cyclohexane-acetic acid-propionic acid

1989 ◽  
Vol 54 (11) ◽  
pp. 2840-2847 ◽  
Author(s):  
Ivona Malijevská ◽  
Alena Maštalková ◽  
Marie Sýsová
Keyword(s):  
Acetic Acid ◽  
Ternary System ◽  
Propionic Acid ◽  
Activity Coefficients ◽  
Error Propagation ◽  
Analytical Techniques ◽  
Liquid Equilibrium ◽  
Consistency Test ◽  
Propagation Law ◽  
Equilibrium Data

Isobaric equilibrium data (P = 101.3 kPa) for the system cyclohexane-acetic acid-propionic acid have been measured by two different analytical techniques. Activity coefficients calculated by simultaneous solving of equations for the chemical and phase equilibria were subjected to a consistency test based on inaccuracies determined from the error propagation law, and were correlated by Wilson’s equation. The activity coefficients measured were compared with those calculated from binary vapour-liquid equilibrium data and with values predicted by the UNIFAC method.

Vapour-liquid equilibrium in the benzene(1)-propionic acid(2)-acetic acid(3) ternary system

1986 ◽  
Vol 51 (12) ◽  
pp. 2665-2674 ◽  
Author(s):  
Ivona Malijevská ◽  
Helena Perničková ◽  
Karel Ledvinka ◽  
Bohuslav Doležal
Keyword(s):  
Acetic Acid ◽  
Ternary System ◽  
Propionic Acid ◽  
Activity Coefficients ◽  
Error Propagation ◽  
Binary Data ◽  
Normal Pressure ◽  
Wilson Equation ◽  
Liquid Equilibrium ◽  
Experimental Values

Results of measurement of vapour-liquid equilibria in the benzene-propionic acid-acetic acid ternary system at normal pressure are presented. The activity coefficients were, within the framework of inaccuracies determined on the basis of the law of error propagation, subjected to a test of consistency and correlated by the Wilson equation. The experimental values of activity coefficients are compared with the values calculated on the basis of the Wilson equation with its constants obtained both from the ternary and from the binary data and with the values estimated by the UNIFAC method.

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